[PATCH] D38954: [Sema] -Wzero-as-null-pointer-constant: don't warn for system macros other than NULL.

[Nico Weber via Phabricator via cfe-commits]

thakis accepted this revision.
thakis added a comment.
This revision is now accepted and ready to land.

In general, "I don't see any way to prevent $slow_thing" just means the patch can't move ahead. But in this case, this looks like fairly small overhead for a worst-case input, so this won't be slow on real-world code. So lgtm.


Repository:
  rL LLVM

https://reviews.llvm.org/D38954